Classic guitar key



FIG. 1 is a perspective view of a classic guitar key showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a left side elevation thereof;

FIG. 5 is a right side elevation thereof;

FIG. 6 is a front elevation thereof; and,

FIG. 7 is a rear elevation thereof.

The broken lines are illustrative purpose only and form no part of the claimed design. 

CLAIM The ornamental design for a classic guitar key, as shown and described. 